Use shell to monitor long time query

In some datawarehouse project, some query may run a very long time; Also in OLTP project, the user may keep blocked and hang in database. The purpose of this article is to identify all the query running a long time.

 

--a container

CREATE TABLE long_query_log(sid NUMBER, serial# NUMBER, osuser VARCHAR2(30), sql_text VARCHAR2(1000));

CREATE INDEX i_osuser_idx ON long_query_log(osuser);
CREATE INDEX i_sqltext_idx ON long_query_log(sql_text);

--shell scripts

#Env part
CONNECT_STR=customer/cusd2t@wmomsd2; export CONNECT_STR
LOG_DIR=/home/rxyu/logs; export LOG_DIR
LOG_FILE=$LOG_DIR/monitor/monitor_rxyu_`date '+%Y_%m_%d'`.log; export LOG_FILE
REPORT_FILE=$LOG_DIR/reports/report_rxyu_`date '+%Y_%m_%d'`.lst; export REPORT_FILE

#app body
sqlplus -s $CONNECT_STR <<EOF >>$LOG_FILE

TRUNCATE TABLE long_query_log;
MERGE INTO long_query_log orig
USING (SELECT a.sid, a.serial#, a.osuser, b.sql_text
         FROM v/$session a, v/$sqlarea b
        WHERE a.sql_address = b.address
          AND a.username = 'CUSTOMER'
          AND a.osuser = 'rxyu') get
ON (orig.sid = get.sid AND orig.serial# = get.serial#)
WHEN NOT MATCHED THEN
  INSERT (sid, serial#, osuser, sql_text)
  VALUES
    (get.sid, get.serial#, get.osuser, get.sql_text);

set serveroutput on
set linesize 150
column sid format 999999
column serial format 999999
column osuser format A10
column sql_text format A100 wrapped
spool $REPORT_FILE
select * from  long_query_log;
spool off
EOF

--after work

--From DB

SELECT * FROM long_query_log;

--From file of linux

~>less ~/logs/reports/report_rxyu_2010_06_03.lst

    SID    SERIAL# OSUSER     SQL_TEXT                                                                                                               
------- ---------- ---------- ----------------------------------------------------------------------------------------------------                   
    262       2559 rxyu        select * from wcu_line_item a, wcu_line_item b                                                                        
    291      64065 rxyu       MERGE INTO long_query_log orig USING (SELECT a.sid, a.serial#, a.osuser, b.sql_text          FROM v$                   
                              session a, v$sqlarea b         WHERE a.sql_address = b.address           AND a.username = 'CUSTOMER'                   
                                         AND a.osuser = 'rxyu') get ON (orig.sid = get.sid AND orig.serial# = get.serial#) WHEN NO                   
                              T MATCHED THEN   INSERT (sid, serial#, osuser, sql_text)   VALUES     (get.sid, get.serial#, get.osu                   
                              ser, get.sql_text)